EP1089909B1 - Device for dosing and filling a liquid into packaging containers - Google Patents

Device for dosing and filling a liquid into packaging containers Download PDF

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Publication number
EP1089909B1
EP1089909B1 EP00938474A EP00938474A EP1089909B1 EP 1089909 B1 EP1089909 B1 EP 1089909B1 EP 00938474 A EP00938474 A EP 00938474A EP 00938474 A EP00938474 A EP 00938474A EP 1089909 B1 EP1089909 B1 EP 1089909B1
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EP
European Patent Office
Prior art keywords
filling
liquid
dosing
pressure
temperature
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EP00938474A
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German (de)
French (fr)
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EP1089909A1 (en
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Werner Mayer
Detlef Boertz
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G15/00—Arrangements for check-weighing of materials dispensed into removable containers
    • G01G15/006—Arrangements for check-weighing of materials dispensed into removable containers using electrical, electromechanical, or electronic means not covered by G01G15/001, G01G15/02, G01G15/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B65B3/28—Methods or devices for controlling the quantity of the material fed or filled by weighing

Definitions

  • the invention relates to a device for dosing and Filling a liquid into packaging containers after The preamble of claim 1, as is known from EP 0 720 562 B1 is known.
  • a temperature sensor in the distributor which detects the temperature of the liquid to be filled and this to a control device as an input variable forwards.
  • the filling accuracy can be increased. It has it turns out, however, when dosing small quantities, that the temperature measurement in the manifold with respect to a any change in the control times of the metering valves and thus the filling accuracy is no longer sufficiently precise. This is because the temperature of the bottled Liquid on its way from the distributor to the containers changes so that a temperature recorded in the manifold does not representative of the temperature of the liquid at actual dosing is.
  • the object of the invention is therefore a generic Device for dosing and filling a liquid in Develop packaging containers so that they at Filling small amounts of liquid (meant here especially liquid quantities less than ten milliliters) has a higher filling accuracy.
  • This task will solved by features of claim 1. More beneficial Developments of the device according to the invention result itself from the subclaims.
  • An embodiment of the invention is in the drawing shown a device for dosing and filling a liquid in packaging container in schematic View shows, and in the description below is explained.
  • the device for dosing and filling a liquid in packaging container 10 has a conveyor 11, with the packaging container 10, such as ampoules or Vials, treatment stations arranged one behind the other are fed.
  • the conveyor 11 has one Transport screw 12 for cyclical or continuous Transport of the packaging container 10 on.
  • the Packaging container 10 stand and slide on Rail pieces 13 to 15. Between the rail pieces 13 and 14 or 14 and 15 is one over one Ejection device 16 controllable weighing device 17, 18th arranged for one packaging container 10 each which the one weighing device 17, the tare weight G1 and the other weighing device 18 is the gross weight G2 of the Packaging container 10 detected and a control device 19 as an input variable.
  • the weighing devices 17, 18 can instead of inside the bottling line can of course also be arranged outside of this.
  • control device 19 are, for example product-specific data, such as the viscosity curve of the Fluid over temperature as well as device data stored.
  • product-specific data such as the viscosity curve of the Fluid over temperature
  • device data stored With the control device 19 is an input / output unit 20 connected, in particular a Target filling quantity M or a target filling weight of Packaging container 10 to the control device 19th can be entered.
  • the Filling device 22 includes the cyclical transport of Packaging container 10 one of the number of each conveying cycle filling packaging container 10 corresponding number of Filling heads 23, for example six, each one up and down have removable hollow filling needle 24. Every filling head 23 is individual with one from the control device 19 controllable metering valve 25 coupled for the liquid.
  • the metering valves 25 are connected to a via short lines 26 common tubular manifold 30 connected in the one Liquid pressure P1 prevails.
  • the distributor 30 is in turn via a line 33 and a Quick release device 34 with a product storage container 35 connected.
  • the pressure differential between the one with the Liquid fully filled manifold 30 and individual metering valves 25 is, for example, by a Arrangement of the metering valves 25 in the same vertical Distance to distributor 30 always the same size.
  • the reservoir 35 is a Pressure line 36 is pressurized with a gas pressure P2.
  • the pressure sensor 32 is with the control device 19 connected.
  • a temperature sensor 27 for detecting the in the line 26 prevailing liquid temperature T is arranged. ever the temperature sensor 27 is placed closer to the metering valve 25 is, the more accurate it can be the temperature T of Liquid at the time the liquid flows through determine through the metering valve 25.
  • each is the Metering valves 25 with a separate temperature sensor 27 in its associated line 26 equipped.
  • only individual, representative selected Dosing valves 25 or one or more groups of Dosing valves 25 to be equipped with temperature sensors 27. In individual cases, this is based on the given geometric Installation conditions of the metering valves 25 and the lines 26 to decide.
  • different lengths of the Lines 26 or the passing of lines 26 on heated or cooled components of the device take into account the different temperature changes the liquid on its way from the distributor 30 to Dosing valve 25 result.
  • the packaging container 10 are from the screw conveyor 12 fed to the filling device 22 in cycles. As soon as the packaging container 10 among them Filling heads 23 are positioned, the filling needles 24 the filling heads 23 lowered and into the packaging container 10 introduced. At the same time begins with a corresponding Control of the metering valves 25 by the control device 19 the filling of the target filling quantity M into the Packaging container 10.
  • a control time Z for the metering valves 25 for dosing the target filling quantity M through the Control device 19 are both the one or the Temperature sensors 27 measured temperatures T, as well the pressure P1 determined by the pressure sensor 32 based on. It should be noted that the nearby of the metering valves 25 in the manifold 30 measured pressure P1 represents a total pressure of the liquid consisting of the gas pressure P2 and the hydrostatic pressure of the Liquid column above the pressure sensor 32.
  • the device Because of the geometry the device, and thus the pressure drop between the pressure sensor 32 and the metering valves 25 known and in the control device 19 is thus stored solely with the pressure value P1 and the known form factors of the metering valves 25 and one of the liquid parameters exact calculation of the control time Z of the metering valves 25.
  • the temperature sensor or sensors 27 also the different viscosity with different Temperatures T of the liquid when calculating the Control time Z is taken into account and the control time Z of Dosing valves 25 individually or in groups accordingly customized.
  • the metered amount of liquid is controlled by the control device 19 as the difference between the gross weight G2 and the tare weight G1 calculated. It is with the help of the so-called statistical process control (SPC) possible at sub or Exceeding defined intervention limits, for example the amount of liquid, but also the tare weight G1 the packaging container 10, of the Control device 19 a correspondingly corrected Control time Z of the metering valves 25 to determine.
  • SPC statistical process control
  • the or the temperature sensors 27 in the lines 26 arranged without specifying the exact installation location.
  • the Dosing valves 25 the exact temperature of the Liquid when flowing through the metering valves 25 should be taken as a basis, if it is the Allow installation conditions, the or the temperature sensors 27 as close as possible to the metering valve (s) 25 place.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Basic Packing Technique (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Dosieren und Abfüllen einer Flüssigkeit in Verpackungsbehälter nach dem Oberbegriff des Anspruchs 1, wie sie aus der EP 0 720 562 B1 bekannt ist. Bei der bekannten Vorrichtung ist vorgesehen, in dem Verteiler ggf. einen Temperatursensor anzuordnen, der die Temperatur der abzufüllenden Flüssigkeit erfaßt und diese an eine Steuereinrichtung als Eingangsgröße weiterleitet. Insbesondere bei Flüssigkeiten, deren Viskosität stark temperaturabhängig ist, kann dadurch mittels einer entsprechenden Änderung der Ansteuerzeit der Dosierventile die Abfüllgenauigkeit erhöht werden. Es hat sich jedoch beim Dosieren kleiner Füllmengen herausgestellt, daß die Temperaturmessung im Verteiler in bezug auf eine etwaige Änderung der Ansteuerzeiten der Dosierventile und somit die Füllgenauigkeit nicht mehr ausreichend genau ist. Dies rührt daher, daß sich die Temperatur der abzufüllenden Flüssigkeit auf ihrem Weg vom Verteiler zu den Behältern ändert, so daß eine im Verteiler erfasste Temperatur nicht repräsentativ für die Temperatur der Flüssigkeit beim eigentlichen Dosieren ist. The invention relates to a device for dosing and Filling a liquid into packaging containers after The preamble of claim 1, as is known from EP 0 720 562 B1 is known. In the known device it is provided if necessary, to arrange a temperature sensor in the distributor which detects the temperature of the liquid to be filled and this to a control device as an input variable forwards. Especially with liquids whose Viscosity is strongly temperature-dependent, it can by means of a corresponding change in the activation time of the Dosing valves the filling accuracy can be increased. It has it turns out, however, when dosing small quantities, that the temperature measurement in the manifold with respect to a any change in the control times of the metering valves and thus the filling accuracy is no longer sufficiently precise. This is because the temperature of the bottled Liquid on its way from the distributor to the containers changes so that a temperature recorded in the manifold does not representative of the temperature of the liquid at actual dosing is.

Aufgabe der Erfindung ist es daher, eine gattungsgemäße Vorrichtung zum Dosieren und Abfüllen einer Flüssigkeit in Verpackungsbehälter derart weiterzubilden, daß sie beim Abfüllen kleiner Flüssigkeitsmengen (gemeint sind hier insbesondere Flüssigkeitsmengen kleiner zehn Milliliter) eine höhere Abfüllgenauigkeit aufweist. Diese Aufgabe wird durch Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Weiterbildungen der erfindungsgemäßen Vorrichtung ergeben sich aus den Unteransprüchen.The object of the invention is therefore a generic Device for dosing and filling a liquid in Develop packaging containers so that they at Filling small amounts of liquid (meant here especially liquid quantities less than ten milliliters) has a higher filling accuracy. This task will solved by features of claim 1. More beneficial Developments of the device according to the invention result itself from the subclaims.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt, die eine Vorrichtung zum Dosieren und Abfüllen einer Flüssigkeit in Verpackungsbehälter in schematischer Ansicht zeigt, und in der nachfolgenden Beschreibung näher erläutert wird.An embodiment of the invention is in the drawing shown a device for dosing and filling a liquid in packaging container in schematic View shows, and in the description below is explained.

Die Vorrichtung zum Dosieren und Abfüllen einer Flüssigkeit in Verpackungsbehälter 10 hat eine Fördereinrichtung 11, mit der Verpackungsbehälter 10, wie beispielsweise Ampullen oder Vials, hintereinander angeordneten Behandlungsstationen zugeführt werden. Die Fördereinrichtung 11 weist eine Transportschnecke 12 zum taktweisen oder kontinuierlichen Transport der Verpackungsbehälter 10 auf. Die Verpackungsbehälter 10 stehen und gleiten auf Schienenstücken 13 bis 15. Zwischen den Schienenstücken 13 und 14 bzw. 14 und 15 ist jeweils eine über eine Ausschleußeinrichtung 16 ansteuerbare Wägeeinrichtung 17, 18 für jeweils einen Verpackungsbehälter 10 angeordnet, von denen die eine Wägeeinrichtung 17 das Tara-Gewicht G1 und die andere Wägeeinrichtung 18 das Brutto-Gewicht G2 des Verpackungsbehälters 10 erfaßt und einer Steuereinrichtung 19 als Eingangsgröße zuführt. Die Wägeeinrichtungen 17, 18 können anstelle innerhalb der Abfüllanlage selbstverständlich auch außerhalb dieser angeordnet sein. The device for dosing and filling a liquid in packaging container 10 has a conveyor 11, with the packaging container 10, such as ampoules or Vials, treatment stations arranged one behind the other are fed. The conveyor 11 has one Transport screw 12 for cyclical or continuous Transport of the packaging container 10 on. The Packaging container 10 stand and slide on Rail pieces 13 to 15. Between the rail pieces 13 and 14 or 14 and 15 is one over one Ejection device 16 controllable weighing device 17, 18th arranged for one packaging container 10 each which the one weighing device 17, the tare weight G1 and the other weighing device 18 is the gross weight G2 of the Packaging container 10 detected and a control device 19 as an input variable. The weighing devices 17, 18 can instead of inside the bottling line can of course also be arranged outside of this.

In der Steuereinrichtung 19 sind beispielsweise produktspezifische Daten, wie der Viskositätsverlauf der Flüssigkeit über der Temperatur sowie Daten der Vorrichtung abgespeichert. Mit der Steuereinrichtung 19 ist eine Ein/Ausgabeeinheit 20 verbunden, über die insbesondere eine Sollfüllmenge M bzw. ein Sollfüllgewicht der Verpackungsbehälter 10 an die Steuereinrichtung 19 eingegeben werden kann.In the control device 19 are, for example product-specific data, such as the viscosity curve of the Fluid over temperature as well as device data stored. With the control device 19 is an input / output unit 20 connected, in particular a Target filling quantity M or a target filling weight of Packaging container 10 to the control device 19th can be entered.

Oberhalb der Fördereinrichtung 11 ist im Bereich des Schienenstücks 14 eine Abfülleinrichtung 22 angeordnet. Die Abfülleinrichtung 22 umfaßt beim taktweisen Transport der Verpackungsbehälter 10 eine der Anzahl der pro Fördertakt zu füllenden Verpackungsbehälter 10 entsprechende Anzahl von Abfüllköpfen 23, beispielsweise sechs, die jeweils eine aufund abbewegbare hohle Füllnadel 24 haben. Jeder Abfüllkopf 23 ist mit je einem von der Steuereinrichtung 19 einzeln ansteuerbaren Dosierventil 25 für die Flüssigkeit gekoppelt. Die Dosierventile 25 sind über kurze Leitungen 26 mit einem gemeinsamen, rohrförmigen Verteiler 30 verbunden, in dem ein Flüssigkeitsdruck P1 herrscht. Der Verteiler 30 ist seinerseits über eine Leitung 33 und eine Schnellspanneinrichtung 34 mit einem Produkt-Vorratsbehälter 35 verbunden. Das Druckgefälle zwischen dem mit der Flüssigkeit vollständig gefüllten Verteiler 30 und den einzelnen Dosierventilen 25 ist beispielsweise durch eine Anordnung der Dosierventile 25 in gleichem vertikalem Abstand zum Verteiler 30 stets gleich groß.Above the conveyor 11 is in the area of Rail piece 14 arranged a filling device 22. The Filling device 22 includes the cyclical transport of Packaging container 10 one of the number of each conveying cycle filling packaging container 10 corresponding number of Filling heads 23, for example six, each one up and down have removable hollow filling needle 24. Every filling head 23 is individual with one from the control device 19 controllable metering valve 25 coupled for the liquid. The metering valves 25 are connected to a via short lines 26 common tubular manifold 30 connected in the one Liquid pressure P1 prevails. The distributor 30 is in turn via a line 33 and a Quick release device 34 with a product storage container 35 connected. The pressure differential between the one with the Liquid fully filled manifold 30 and individual metering valves 25 is, for example, by a Arrangement of the metering valves 25 in the same vertical Distance to distributor 30 always the same size.

In dem Vorratsbehälter 35 befindet sich vorteilhafterweise die Menge an Flüssigkeit, die während einer Produktionsschicht zur Abfüllung der Verpackungsbehälter 10 benötigt wird. Dadurch ergibt sich, daß die Füllhöhe im Vorratsbehälter 35 bei jedem Abfüllzyklus nur in sehr geringem Maße abnimmt. Der Vorratsbehälter 35 ist über eine Druckleitung 36 mit einem Gasdruck P2 beaufschlagt.It is advantageously located in the storage container 35 the amount of fluid that flows during a Production layer for filling the packaging container 10 is needed. This means that the fill level in Storage container 35 in each filling cycle only in very decreases slightly. The reservoir 35 is a Pressure line 36 is pressurized with a gas pressure P2.

Vorteilhafterweise besteht dabei eine Beeinflussung zwischen den Drücken P1 und P2, so daß P2 beispielseise von der Steuereinrichtung 19 so geregelt wird, daß sich stets ein Druck P1 einstellt, dessen Toleranz zum Beispiel +/- 0,05 bar beträgt. Somit können verschiedene Anordnungen des Vorratsbehälters 35 an der Vorrichtung sowie ein sinkender Flüssigkeitsspiegel in dem Vorratsbehälter 35 ausgeglichen werden.There is advantageously an influence between the pressures P1 and P2, so that P2, for example, from the Control device 19 is regulated so that there is always a Set pressure P1, its tolerance for example +/- 0.05 bar. Thus, various arrangements of the Storage container 35 on the device and a sinking Liquid level in the reservoir 35 balanced become.

Es ist jedoch auch möglich, den Druck P2 für sich genommen annähernd konstant zu regeln, wodurch der Druck P1 mit sinkendem Flüssigkeitspegel nach und nach abnimmt. Durch den Druck P2 wird generell ein höherer Druck der Flüssigkeit an den Dosierventilen 25, und damit eine größere Abflußgeschwindigkeit aus dem Vorratsbehälter 35 ermöglicht, was insbesondere bei hochviskosen Flüssigkeiten das Fließverhalten begünstigt.However, it is also possible to take pressure P2 on its own to regulate approximately constant, whereby the pressure P1 with decreasing liquid level gradually decreases. By the Pressure P2 will generally indicate a higher pressure of the liquid the metering valves 25, and thus a larger one Outflow rate from the reservoir 35 enables which is especially the case with highly viscous liquids Flow behavior favors.

Im Verteiler 30 ist ein Drucksensor 32 zur Erfassung des Flüssigkeitsdruckes P1 angeodnet. Der Drucksensor 32 ist mit der Steuereinrichtung 19 verbunden.A pressure sensor 32 for detecting the Liquid pressure P1 ordered. The pressure sensor 32 is with the control device 19 connected.

Erfindungswesentlich ist, daß in wenigstens einer Leitung 26 zwischen dem Verteiler 30 und dem zugeordneten Dosierventil 25 ein Temperatursensor 27 zur Erfassung der in der Leitung 26 herrschenden Flüssigkeitstemperatur T angeordnet ist. Je näher der Temperatursensor 27 am Dosierventil 25 plaziert ist, desto genauer kann dieser die Temperatur T der Flüssigkeit zum Zeitpunkt des Durchströmens der Flüssigkeit durch das Dosierventil 25 bestimmen. Der Temperatursensor 27, der bevorzugt als PT 100, Thermoelement oder Pyrometer ausgebildet ist, ist mit der Steuereinrichtung 19 verbunden und leitet dieser die Temperatur T als Eingangsgröße zu.It is essential to the invention that in at least one line 26 between the distributor 30 and the associated metering valve 25 a temperature sensor 27 for detecting the in the line 26 prevailing liquid temperature T is arranged. ever the temperature sensor 27 is placed closer to the metering valve 25 is, the more accurate it can be the temperature T of Liquid at the time the liquid flows through determine through the metering valve 25. The temperature sensor 27, preferably as a PT 100, thermocouple or pyrometer is formed, is connected to the control device 19 and forwards the temperature T as an input variable.

Im dargestellten Ausführungbeispiel ist jedes der Dosierventile 25 mit einem separaten Temperatursensor 27 in seiner zugeordneten Leitung 26 ausgestattet. Es ist jedoch auch möglich, nur einzelne, repräsentativ ausgewählte Dosierventile 25 oder jeweils eine oder mehrere Gruppen von Dosierventilen 25 mit Temperatursensoren 27 auszurüsten. Dies ist im Einzelfall anhand der vorgegebenen geometrischen Einbauverhältnisse der Dosierventile 25 und der Leitungen 26 zu entscheiden. Dabei sind u.a. unterschiedliche Lägen der Leitungen 26 oder das Vorbeiführen von Leitungen 26 an erwärmten oder gekühlten Bauteilen der Vorrichtung zu berücksichtigen, die unterschiedliche Temperaturänderungen der Flüssigkeit auf ihrem Weg vom Verteiler 30 zum Dosierventil 25 zur Folge haben.In the illustrated embodiment, each is the Metering valves 25 with a separate temperature sensor 27 in its associated line 26 equipped. However, it is also possible, only individual, representative selected Dosing valves 25 or one or more groups of Dosing valves 25 to be equipped with temperature sensors 27. In individual cases, this is based on the given geometric Installation conditions of the metering valves 25 and the lines 26 to decide. Among other things, different lengths of the Lines 26 or the passing of lines 26 on heated or cooled components of the device take into account the different temperature changes the liquid on its way from the distributor 30 to Dosing valve 25 result.

Die oben beschriebene Vorrichtung arbeitet wie folgt:The device described above works as follows:

Die Verpackungsbehälter 10 werden von der Transportschnecke 12 der Abfülleinrichtung 22 taktweise zugefördert. Sobald die Verpackungsbehälter 10 unter den ihnen zugeordneten Abfüllköpfen 23 positioniert sind, werden die Füllnadeln 24 der Abfüllköpfe 23 abgesenkt und in die Verpackungsbehälter 10 eingeführt. Gleichzeitig beginnt durch eine entsprechende Ansteuerung der Dosierventile 25 durch die Steuereinrichtung 19 das Abfüllen der Soll-Füllmenge M in die Verpackungsbehälter 10.The packaging container 10 are from the screw conveyor 12 fed to the filling device 22 in cycles. As soon as the packaging container 10 among them Filling heads 23 are positioned, the filling needles 24 the filling heads 23 lowered and into the packaging container 10 introduced. At the same time begins with a corresponding Control of the metering valves 25 by the control device 19 the filling of the target filling quantity M into the Packaging container 10.

Zur Berechnung einer Ansteuerzeit Z für die Dosierventile 25 zum Dosieren der Soll-Füllmenge M durch die Steuereinrichtung 19 werden sowohl die von dem oder den Temperatursensoren 27 gemessenen Temperaturen T, als auch der von dem Drucksensor 32 ermittelte Druck P1 zugrundegelegt. Dabei ist zu beachten, daß der in der Nähe der Dosierventile 25 im Verteiler 30 gemessene Druck P1 einen Gesamtdruck der Flüssigkeit darstellt, bestehend aus dem Gasdruck P2 und dem hydrostatischen Druck der Flüssigkeitssäule über dem Drucksensor 32. Da die Geometrie der vorrichtung, und damit auch das Druckgefälle zwischen dem Drucksensor 32 und den Dosierventilen 25 bekannt und in der Steuereinrichtung 19 abgespeichert ist, erfolgt somit allein mit dem Druckwert P1 und den bekannten Formfaktoren der Dosierventile 25 sowie den Flüssigkeitsparametern eine exakte Berechnung der Ansteuerzeit Z der Dosierventile 25. Insbesondere wird durch den bzw. die Temperatursensoren 27 auch die unterschiedliche Viskosität bei unterschiedlichen Temperaturen T der Flüssigkeit bei der Berechnung der Ansteuerzeit Z berücksichtigt und die Ansteuerzeit Z der Dosierventile 25 individuell oder gruppenweise entsprechend angepasst.To calculate a control time Z for the metering valves 25 for dosing the target filling quantity M through the Control device 19 are both the one or the Temperature sensors 27 measured temperatures T, as well the pressure P1 determined by the pressure sensor 32 based on. It should be noted that the nearby of the metering valves 25 in the manifold 30 measured pressure P1 represents a total pressure of the liquid consisting of the gas pressure P2 and the hydrostatic pressure of the Liquid column above the pressure sensor 32. Because of the geometry the device, and thus the pressure drop between the pressure sensor 32 and the metering valves 25 known and in the control device 19 is thus stored solely with the pressure value P1 and the known form factors of the metering valves 25 and one of the liquid parameters exact calculation of the control time Z of the metering valves 25. In particular, the temperature sensor or sensors 27 also the different viscosity with different Temperatures T of the liquid when calculating the Control time Z is taken into account and the control time Z of Dosing valves 25 individually or in groups accordingly customized.

Ist die durch die Ansteuerzeit Z bestimmte Soll-Füllmenge M in die Verpackungsbehälter 10 eingebracht, so werden die Füllnadeln 24 durch die Abfüllköpfe 23 wieder aus den Verpackungsbehältern 10 herausgehoben. Anschließend werden die Verpackungsbehälter 10 durch die Förderschnecke 12 taktweise einer anderen Bearbeitungsstation, beispielsweise einer Verschließstation, zugefördert. Gleichzeitig wiederholt sich für neu in die Vorrichtung geförderte Verpackungsbehälter 10 der Vorgang wie oben beschrieben.Is the target filling quantity M determined by the control time Z introduced into the packaging container 10, so the Filling needles 24 through the filling heads 23 again Packaging containers 10 lifted out. Then be the packaging container 10 through the screw conveyor 12 cyclically another processing station, for example a capping station. simultaneously repeats itself for newly funded in the device Packaging container 10 the process as described above.

Um die exakte Dosierung der Flüssigkeitsmenge und damit der Soll-Füllmenge M durch die Vorrichtung zu kontrollieren beziehungsweise zu regeln, werden stichprobenartig über die Ausschleußeinrichtungen 16 einzelne Verpackungsbehälter 10 entnommen und den Wägeeinrichtungen 17, 18 zugeführt. Die dosierte Flüssigkeitsmenge wird von der Steuereinrichtung 19 als Differenz des Brutto-Gewichts G2 und des Tara-Gewichts G1 errechnet. Dabei ist es mit Hilfe der sogenannten statistischen Prozeßkontrolle (SPC) möglich, beim Unteroder Überschreiten von definierten Eingriffsgrenzen, beispielsweise der Flüssigkeitsmenge, aber auch des Tara-Gewichts G1 der Verpackungsbehälter 10, von der Steuereinrichtung 19 eine entsprechend korrigierte Ansteuerzeit Z der Dosierventile 25 zu ermitteln. Selbstverständlich kann anstelle zweier Wägeeinrichtungen 17, 18 auch nur eine einzige Wägeeinrichtung verwendet werden. Diese kann auch manuell mit Verpackungsbehältern 10 beschickt werden, wesentlich ist lediglich, daß auf diese Weise die eindosierte Flüssigkeitsmenge bestimmt werden kann und diese der Steuereinrichtung 19 zugeführt wird.To the exact dosage of the amount of liquid and thus the Check the set filling quantity M by the device or to regulate, are randomly sampled via the Reject devices 16 individual packaging containers 10 removed and fed to the weighing devices 17, 18. The The metered amount of liquid is controlled by the control device 19 as the difference between the gross weight G2 and the tare weight G1 calculated. It is with the help of the so-called statistical process control (SPC) possible at sub or Exceeding defined intervention limits, for example the amount of liquid, but also the tare weight G1 the packaging container 10, of the Control device 19 a correspondingly corrected Control time Z of the metering valves 25 to determine. Of course, instead of two weighing devices 17, 18 also used only a single weighing device become. This can also be done manually with packaging containers 10 be loaded, the only essential thing is that on this How the metered amount of liquid can be determined and this is fed to the control device 19.

Ist der Vorratsbehälter 35 nach Ablauf einer Produktionsschicht leer, oder soll eine andere Produktcharge verwendet werden, so kann durch einfaches Ab- bzw. Ankoppeln eines anderen Vorratsbehälters 35 mittels der Schnellspanneinrichtung 34 die Betriebsbereitschaft der Vorrichtung wieder hergestellt werden. Es ist lediglich das Anschließen der Druckleitung 36 für den Gasdruck P2 an den Vorratsbehälter 35 notwendig.Is the reservoir 35 after a Production shift empty, or should another batch of product can be used by simply disconnecting or connecting another storage container 35 by means of the Quick release device 34 the operational readiness of Device to be restored. It’s just that Connecting the pressure line 36 for the gas pressure P2 to the Storage container 35 necessary.

Bei dem oben beschriebenen Ausführungsbeispiel wurden der bzw. die Temperatursensoren 27 in den Leitungen 26 angeordnet, ohne den genauen Einbauort zu spezifizieren. Aus der Erkenntnis, daß zum Berechnen der Ansteuerzeit Z der Dosierventile 25 möglichst die exakte Temperatur der Flüssigkeit beim Durchströmen der Dosierventile 25 zugrundegelegt werden sollte ergibt sich, falls es die Einbauverhältnisse zulassen, den bzw. die Temperatursensoren 27 möglichst nahe an dem bzw. den Dosierventilen 25 zu plazieren.In the embodiment described above, the or the temperature sensors 27 in the lines 26 arranged without specifying the exact installation location. Out the knowledge that to calculate the control time Z the Dosing valves 25 the exact temperature of the Liquid when flowing through the metering valves 25 should be taken as a basis, if it is the Allow installation conditions, the or the temperature sensors 27 as close as possible to the metering valve (s) 25 place.

Claims (3)

  1. Device for dosing and filling a liquid into packaging containers (10), with a product storage container (35) which is subject to a specific gas pressure (P2) and is connected to filling valves (25) via a distributor (30) from which connection lines (26) issue, said filling valves (25), for dosing a predetermined filling amount (M), being opened and closed by a control device (19) on the basis of a pressure (P1) detected by a pressure sensor (32) arranged in the distributor (30), and with at least one temperature sensor (27) for detecting the temperature (T) of the liquid in order to influence the time of actuation (Z) of the filling valves (25) by the control device, characterized in that the at least one temperature sensor (27) is arranged in one of the connection lines (26) between the distributor (30) and the corresponding filling valve (25).
  2. Device according to Claim 1, characterized in that the at least one temperature sensor (27) is arranged in immediate proximity to the filling valve (25).
  3. Device according to Claim 1 or 2, characterized in that a temperature sensor (27) is arranged in each connection line (26), so that the actuation time (Z) of each filling valve (25) is determined individually on the basis of the temperature (T) detected by the associated temperature sensor (27).
EP00938474A 1999-04-17 2000-04-05 Device for dosing and filling a liquid into packaging containers Revoked EP1089909B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19917441A DE19917441C2 (en) 1999-04-17 1999-04-17 Device for dosing and filling a liquid into packaging containers
DE19917441 1999-04-17
PCT/DE2000/001101 WO2000063076A1 (en) 1999-04-17 2000-04-05 Device for dosing and filling a liquid into packaging containers

Publications (2)

Publication Number Publication Date
EP1089909A1 EP1089909A1 (en) 2001-04-11
EP1089909B1 true EP1089909B1 (en) 2004-06-30

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EP00938474A Revoked EP1089909B1 (en) 1999-04-17 2000-04-05 Device for dosing and filling a liquid into packaging containers

Country Status (5)

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US (1) US6397905B1 (en)
EP (1) EP1089909B1 (en)
JP (1) JP2002542118A (en)
DE (2) DE19917441C2 (en)
WO (1) WO2000063076A1 (en)

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Also Published As

Publication number Publication date
DE19917441A1 (en) 2000-10-26
EP1089909A1 (en) 2001-04-11
US6397905B1 (en) 2002-06-04
DE50006941D1 (en) 2004-08-05
JP2002542118A (en) 2002-12-10
DE19917441C2 (en) 2001-10-11
WO2000063076A1 (en) 2000-10-26

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